Police Chief William McManus said Marconi was writing a ticket in his patrol car when a man drove up, firing two bullets into Marconi’s car, striking him both times. Marconi died at San Antonio Military Medical Center.

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In the past year, the department has honored other officers killed in the line of duty over the history of the department’s century of service.

Below is just a sample of the messages the department has posted on its Facebook page.

The first-known officer killed in the line of duty was Fredrick Fieldstrup. He was killed on May 29, 1857.

Robert Deckard, the department's most recent officer killed in the line of duty, died on Dec. 8, 2013, while in pursuit of two robbery suspects. He died 12 days later after being taken off life support.